If you have a finished track that you want to promote, you need to reach out to editors at music blogs. A feature on a popular blog can give the push you need to get heard. But finding blogs that will listen to your music is harder. Finding their contact details is harder.
This article has a downloadable spreadsheet with 101 blogs that listen to music from different genres. Also includes their contact details and submission notes. Plus some helpful tips and tactics on approaching your music PR.
https://midination.com/blogs-submit-music/